(function () {
Java.perform(function() {
console.log("");
console.log("[.] Cert Pinning Bypass/Re-Pinning");
var URL = Java.use('java.net.URL');
var InputStreamReader = Java.use('java.io.InputStreamReader');
var CertificateFactory = Java.use("java.security.cert.CertificateFactory");
var FileInputStream = Java.use("java.io.FileInputStream");
var BufferedInputStream = Java.use("java.io.BufferedInputStream");
var X509Certificate = Java.use("java.security.cert.X509Certificate");
var KeyStore = Java.use("java.security.KeyStore");
var TrustManagerFactory = Java.use("javax.net.ssl.TrustManagerFactory");
var SSLContext = Java.use("javax.net.ssl.SSLContext");
console.log("[+] Loading our CA...")
var cf = CertificateFactory.getInstance("X.509");
try {
var fiddlerUrl = URL.$new("http://192.168.1.101:8888/FiddlerRoot.cer");
var connection = fiddlerUrl.openConnection();
}
catch(err) {
console.log("[o] " + err);
}
var bufferedInputStream = BufferedInputStream.$new(connection.getInputStream());
var ca = cf.generateCertificate(bufferedInputStream);
bufferedInputStream.close();
var certInfo = Java.cast(ca, X509Certificate);
console.log("[o] Our CA Info: " + certInfo.getSubjectDN());
console.log("[+] Creating a KeyStore for our CA...");
var keyStoreType = KeyStore.getDefaultType();
var keyStore = KeyStore.getInstance(keyStoreType);
keyStore.load(null, null);
keyStore.setCertificateEntry("ca", ca);
console.log("[+] Creating a TrustManager that trusts the CA in our KeyStore...");
var tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
var tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
tmf.init(keyStore);
console.log("[+] Our TrustManager is ready...");
console.log("[+] Hijacking SSLContext methods now...")
console.log("[-] Waiting for the app to invoke SSLContext.init()...")
SSLContext.init.overload("[Ljavax.net.ssl.KeyManager;", "[Ljavax.net.ssl.TrustManager;", "java.security.SecureRandom").implementation = function(a,b,c) {
console.log("[o] App invoked javax.net.ssl.SSLContext.init...");
SSLContext.init.overload("[Ljavax.net.ssl.KeyManager;", "[Ljavax.net.ssl.TrustManager;", "java.security.SecureRandom").call(this, a, tmf.getTrustManagers(), c);
console.log("[+] SSLContext initialized with our custom TrustManager!");
}
})})();